Fix IME predictive mode
Fix IME predictive mode

Patch changes the allow_prediction flag to true, which allows
predictive text and underlines the text.

Issue: CBBROWSER-223, CBBROWSER-224, CBBROWSER-225, CBBROWSER-226
Change-Id: Icddd6708db21b6249deb279f84e9c87ae1eaa0de

crosswalk-project/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl